Rotary suction cup

ABSTRACT

Disclosed is a rotary suction cup, comprising a knob, a base, and a rubber bottom arranged from top to bottom, wherein the knob is connected with the rubber bottom, and the base is provided with a connecting portion for connecting a hanging object, and a through hole; the rotary suction cup further comprising: a pivot seat, arranged in the middle of the rubber bottom, and connected with the knob; a pivot tube, arranged in the knob, and sleeved on and moveably connected to the pivot seat; wherein, the pivot seat is axially moved along with the rotation of the pivot tube, the rubber bottom is concavely deformed on a surface thereof by the pivot seat, and the pivot tube or the knob is rotationally connected to the base in a stepped manner of at least two steps.

TECHNICAL FIELD

The invention relates to a rotary suction cup.

BACKGROUND OF THE INVENTION

At present, all suction cups on the market are of a structure withunadjustable suction force. For example, it is common to pull the handleat the center of a rubber bottom base backwards, so that a suctioneffect is generated between the suction cup and the suction surface.When installing a suction cup which requires to be additionallyconnected to the matched wire or other products, such suction cup isrequired to be connected to the corresponding product first and thenfastened together therewith on a wall by suction. Operation of such asuction cup is often carried out repeatedly due to inaccurate alignment.Moreover, it is difficult to install the product to be connected due toits weight and volume, or it may require two people to work together.Also, the repeated operation requires the entire suction cup to bedisassembled for re-installation every time. As a result, the operationis very inconvenient.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings of the prior art, the inventionaims to provide a rotary suction cup with multi-level suction forces,easy position adjustment for installation or connection with accessoriesin use, and simple and convenient operation.

According to the invention, the rotary suction cup comprises a knob, abase, and a rubber bottom from top to bottom, and the base is providedwith a connecting portion for a hanging object, and a through hole. Therotary suction cup further comprises a pivot seat, arranged in themiddle of the rubber bottom, and connected with the knob; a pivot tube,arranged in the knob, and sleeved on and moveably connected to the pivotseat; wherein, the pivot seat is axially moved along with the rotationof the pivot tube. Therefore the rubber bottom is concavely deformed ona surface, and the pivot tube or the knob is connected to the base withat least two-level rotation.

Further, the pivot seat on a circumferential wall is provided with a pitslot extending spirally, correspondingly the pivot tube is provided witha knurl which can be clamped in the pit slot in a sliding manner; thesurface of the base rotationally abuts against the flange of the pivottube outer wall or against the knob; the base is provided with at leastthree notches distributed around an axis of the pivot tube, andcorrespondingly the knob is provided with a limiting bulge matched withthe notches.

Further, the pivot seat, on an edge of the top thereof, on an upper endof the pit slot, is provided with a notch, the bottom surface of thenotch is higher than that of the pit slot, the pivot tube is providedwith a broken pinch plate on a side wall thereof at the knurl, and oneside of a tail end of the knurl, opposite the notch, is formed as abevel.

Further, the pivot tube on an outer wall thereof, and the knob on aninner sidewall thereof, are respectively provided with outer reversebuckles and inner reverse buckles which are fastened to each other.

Further, the rubber bottom is provided with rubber bottom side wallsvertically protruding on edges, correspondingly the base on inner sidesthereof is provided with clamping slots in which the rubber bottom sidewalls are clamped, and a baffle protruding and abutting against therubber bottom.

Further, the base is provided with a baffle protruding to the rubberbottom, on inner sides thereof.

Further, the knob has an eccentrically arranged rotation center, and theknob is rotated on right side to cover or close the connecting portion.

Further, the connecting portion is designed as a straight or curvedgroove.

Further, the connecting portion is provided with slightly convexportions on inner side faces of the groove.

The rotary suction cup provides at least two levels of suctionadjustment. Specifically, the position of the suction cup may be easilyadjusted on a surface while the suction cup is in first level with smallsuction force, and after an item is attached, the suction cup can beturned into the next level for the maximum suction. The operation isvery convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be further described by embodiments with reference tothe accompanying drawings, wherein:

FIG. 1 is an exploded view of a rotary suction cup of the invention;

FIG. 2 is a schematic view of a pivot tube of the invention;

FIG. 3 is a schematic view of a knob of the invention;

FIG. 4 is a schematic view of a base of the invention;

FIG. 5 is a schematic view of the rotary suction cup with the knobrotated to first-level suction, according to the invention;

FIG. 6 is a schematic view of the rotary suction cup with the knobrotated to second-level suction, according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIG. 1, according to the invention, a rotary suctioncup comprises a knob 1, a base 2 and a rubber bottom 3 arranged from topto bottom. The base 2 is connected to the rubber bottom 3. The rotarysuction cup further comprises a pivot seat 4 arranged in the middle ofthe rubber bottom 3and connected to the knob 1, and the base 2 isprovided with a through hole allowing the pivot seat 4 to extend therethrough. The base 2 has a connecting portion 21 for connecting a hangingobject. The rotary suction cup further comprises a pivot tube 5 arrangedin the knob 1, which is matched with and sleeved on the pivot seat 4.The pivot tube 5 and the pivot seat 4 are moveably connected. The pivotseat 4 is moved axially along with the pivot tube 5. And driven by alower end of the pivot seat 4, the rubber bottom 3 is concavely deformedon a surface thereof. The pivot tube 5 or the knob 1 is rotationallyconnected to the base in a position-limiting manner with at least twosteps.

The pivot seat 4 and the pivot tube 5 may be connected with each otherby screw threads respectively formed on a circumferential wall surfaceof pivot seat 4 and an inner connection surface of the pivot tube 5.Alternatively, the pivot seat 4 and the pivot tube 5 may be in clearancefit with each other by a spiral neck or ditch and a stopper which arematched with each other. So that the pivot seat 4 can be moved axiallyalong with the rotation of the knob 1 through the pivot tube 5. With theclamping structure of the pivot seat 4 or the base 2 and the limitingstructure, the knob 1 can be rotated at least two positions from theinitial position. Specifically, in use of the suction cup, the knob 1can be rotated from the initial position into a first position (step 1)for a first level of suction, where the position of the suction cup on asurface can be adjusted to hang an object to the connecting portion 21as the suction force is relatively small. After that, the knob 1 can berotated into a second position (step 2) for a second level of suction,i.e., the maximum suction force of the suction cup, so that the suctioncup can tightly attach on the surface to bear the load. The knob 1 andthe pivot tube 5 may be of an integral structure or a split structure,and similarly, the rubber bottom 3 and the pivot seat 4 may also be ofan integral structure or a split structure.

As shown in FIGS. 1 to 3, the pivot seat 4 is provided with a pit slot41 extending spirally on the circumferential wall, and correspondinglythe pivot tube 5 is provided with a knurl 51 which is clamped in the pitslot 41 in a sliding manner while the pivot tube 5 is sleeved into thepivot seat 4. The surface of base 2 rotationally abuts against a flangeof an outer wall of the pivot tube 5 or the knob 1. The base 2 isprovided with at least three notches 25 distributed around an axis ofthe pivot seat 4, which can achieve to a position-limiting rotation, andcorrespondingly the knob 1 is provided with a limiting bulge 11 engagedin the notches 25. Once the limiting bulge 11 is engaged in the notches25, the knob 1 can be positioned in at least three rotation positionsalong the travel of the knob 1, while forcing the pivot seat 4 to movealong its axial direction via the pivot tube 5: a first position, wherethe knob 1 is positioned in the first notch 25,the pivot seat 4 is notmoved yet (in a initial position), and thus there is no concavedeformation on the surface of the rubber bottom 3 and no suctiongenerated; a second position, where the knob 1 is rotated into a nextnotch 25, the pivot seat 4 is moved up to a first level, and afirst-level concave deformation is formed on the surface of the rubberbottom 3 and thus the first-level suction is generated. By analogy, theknob 1 is rotated into a next position, the pivot seat 4 is moved upfurther, the concave deformation is larger, and thus the suction forcecaused by the concave deformation is further increased accordingly.Specifically, while the knob 1 is forced to rotate, the limiting bulge11 is forced to deviate from the notches 25 through immediate elasticdeformation between each other.

As shown in FIGS. 1 and 2, the pivot seat 4 is provided with a notch 42on an edge, at the upper end of the pit slot 41, of which a bottomsurface is higher than that of the pit slot 41.The pivot tube 5 isprovided with a broken pinch plate 52 on a side wall of the knurl 51,and the corresponding end of the knurl 51and the notch 42 is formed as abevel. In installation, the pivot tube 5 is aligned with the notch 42 ofthe pivot tube 5 through the knurl 51, and the pivot tube 5 is sleevedon the pivot seat 4 in the axial direction. The bevel reduces theresistance and forces the pinch plate 52 to elastically deform slightlyand outwardly, allowing the knurl 51 to pass through the notch 42 andslip into the pit slot 41.

As shown in FIGS. 2 and 3, the pivot tube 5 and the knob 1 are providedwith outer reverse buckles 53 and inner reverse buckles 12 which arematched with and fastened to each other, on the outer wall of the pivottube 5 and the inner side wall of the knob 1 respectively. Preferablythe outer reverse buckles 53 and the inner reverse buckles 12 arearranged on two symmetrical sides of the pivot tube 5. The limit bulge11 is located in the middle of one of the inner reverse buckles 12, andone of the outer reverse buckles 53 is provided with a matched notch forreceiving the limit bulge 11. The limiting bulge 11 is positioned intothe notches 25 and used as the stopper, working with the outer reversebuckle 53 axially for better rotation. The pivot tube 5 is cylindrical,and it provides a flange with an outer diameter greater than the throughhole of the base 2, which abuts against the surface of the base 2.

As shown in FIGS. 1 and 4, the rubber bottom 3 has rubber bottom sidewalls 31 vertically protruding on edges thereof, and correspondingly thebase 2 on inner sides thereof is provided with clamping slots 22engaging with the rubber bottom side walls 31in a clamping manner. Thebase 2 on the inner sides thereof is further provided with a baffle 23protruding to and abutting against the rubber bottom 3. The rubberbottom side walls 31 extend into the clamping slots 22 so that therubber bottom 3 can better support the base 2 in use. The rubber bottomside walls 31 and the clamping slots 22 may be formed in circles,rectangles, triangles or other shapes.

As shown in FIG. 4, the baffle 23 which protrudes to and abuts againstthe rubber bottom 3 is formed on the inner side of the base 2, and thereis no doubt that the baffle 23 should be arranged around thecircumferential wall of the pivot seat 4, to ensure that only theportion of the rubber bottom 3 where the pivot seat 4 is located isallowed to deform concavely to generate negative pressure, and tomaintain the contacting area between the rubber bottom 3 and a suctionsurface under the atmospheric pressure.

As shown in FIGS. 1, 3, 5 and 6, the knob 1 is configured to have aneccentrically arranged rotation center, and the knob 1, with one sidethereof, may rotate to cover or close the connecting portion 21. Theconnecting portion 21 may be designed as a hook, a support plate, a jackor other structures, and correspondingly the side of the knob 1 may bedesigned to close the opening of the hook, or designed as acorresponding shape for covering the support plate and the jack.

As shown in FIG. 1, the connecting portion 21 is designed as a grooveformed on the surface of the base 2, the groove is straight or curvedand used for hooking a wire item, such as a square shelf and a towelrack. Correspondingly, the rubber bottom 3 is further provided with arecess on the rubber bottom side walls 31 at the position correspondingto the groove.

The base 2 is further provided with slightly convex portions 24 on innerside faces of the groove. The clamping opening of the groove is narrowedby the slightly convex portions 24 to enhance the stability of thegroove to tightly clamp the wire item or others.

In FIGS. 5 and 6 a suction cup of a preferred embodiment of theinvention is illustrated. The rotation of the knob 1 can provide twolevels of suction force, and the knob 1 can cover the connecting portion21 while rotated into the potion for the maximum suction. In addition,the pivot seat 4 and the rubber bottom 3 may be assembled into anintegral structure which cannot be dissembled.

Those described above are merely preferred embodiments of the invention,but the invention is not limited to these embodiments. All embodimentsachieving the technical effects of the invention by any identical orsimilar means shall fall within the protection scope of the invention.

The invention claimed is:
 1. A rotary suction cup, comprising a knob, abase, and a rubber bottom, wherein the knob is connected with the rubberbottom, and the base is provided with a connecting portion forconnecting a hanging object, wherein the base comprises a through hole;the rotary suction cup further comprising: a pivot seat, arranged in themiddle of the rubber bottom, and connected with the knob; a pivot tube,arranged in the knob, and sleeved on and moveably connected to the pivotseat; where in, the pivot seat is axially moved along with the rotationof the pivot tube, the rubber bottom is concavely deformed on a surfacethereof by the pivot seat, and the pivot tube or the knob isrotationally connected with the base in a stepped manner to rotate to atleast a first position and a second position, wherein the pivot seat ona circumferential wall thereof is provided with a pit slot extendingspirally, correspondingly the pivot tube is provided with a knurlthereon which is clamped in the pit slot in a sliding manner; the base,by a surface thereof, rotationally abuts against a flange on an outerwall of the pivot tube or against the knob; the base is provided with atleast three notches distributed around an axis of the pivot seat, andcorrespondingly the knob is provided with a limiting bulge matched withthe notches.
 2. The rotary suction cup according to claim 1, wherein thepivot seat, on a top edge thereof, at an upper end of the pit slot, isprovided with a notch, a bottom surface of the notch is higher than thatof the pit slot, the pivot tube is provided with a broken pinch plate ona side wall thereof at the knurl, and one side of a tail end of theknurl, opposite the notch, is formed as a bevel.
 3. The rotary suctioncup according to claim 1, wherein the rubber bottom is provided withrubber bottom side walls vertically protruding on edges thereof, andcorrespondingly, the base on inner sides thereof is provided withclamping slots in which the rubber bottom side walls are clamped, and abaffle protruding and abutting against the rubber bottom.
 4. The rotarysuction cup according to claim 1, wherein the base is provided with abaffle protruding to the rubber bottom, on inner sides thereof.
 5. Arotary suction cup, comprising a knob, a base, and a rubber bottom,wherein the knob is connected with the rubber bottom, and the base isprovided with a connecting portion for connecting a hanging object,wherein the base comprises a through hole; the rotary suction cupfurther comprising: a pivot seat, arranged in the middle of the rubberbottom, and connected with the knob; a pivot tube, arranged in the knob,and sleeved on and moveably connected to the pivot seat; where in, thepivot seat is axially moved along with the rotation of the pivot tube,the rubber bottom is concavely deformed on a surface thereof by thepivot seat, and the pivot tube or the knob is rotationally connectedwith the base in a stepped manner to rotate to at least a first positionand a second position, wherein the pivot tube on an outer wall thereof,and the knob on an inner sidewall thereof, is respectively provided withouter reverse buckles and inner reverse buckles which are fastened toeach other.
 6. The rotary suction cup according to claim 5, wherein therubber bottom is provided with rubber bottom side walls verticallyprotruding on edges thereof, and correspondingly, the base on innersides thereof is provided with clamping slots in which the rubber bottomside walls are clamped, and a baffle protruding and abutting against therubber bottom.
 7. The rotary suction cup according to claim 6, whereinthe connecting portion is designed as a straight or curved groove. 8.The rotary suction cup according to claim 7, wherein the connectingportion is provided with slightly convex portions on inner side faces ofthe groove.
 9. The rotary suction cup according to claim 5, wherein thebase is provided with a baffle protruding to the rubber bottom, on innersides thereof.
 10. A rotary suction cup, comprising a knob, a base, anda rubber bottom, wherein the knob is connected with the rubber bottom,and the base is provided with a connecting portion for connecting ahanging object, wherein the base comprises a through hole; the rotarysuction cup further comprising: a pivot seat, arranged in the middle ofthe rubber bottom, and connected with the knob; a pivot tube, arrangedin the knob, and sleeved on and moveably connected to the pivot seat;where in, the pivot seat is axially moved along with the rotation of thepivot tube, the rubber bottom is concavely deformed on a surface thereofby the pivot seat, and the pivot tube or the knob is rotationallyconnected with the base in a stepped manner to rotate to at least afirst position and a second position, wherein the knob has aneccentrically arranged rotation center, and the knob is rotated with oneside thereof to cover or close the connecting portion.
 11. The rotarysuction cup according to claim 10, wherein the rubber bottom is providedwith rubber bottom side walls vertically protruding on edges thereof,and correspondingly, the base on inner sides thereof is provided withclamping slots in which the rubber bottom side walls are clamped, and abaffle protruding and abutting against the rubber bottom.
 12. The rotarysuction cup according to claim 10, wherein the base is provided with abaffle protruding to the rubber bottom, on inner sides thereof.